Hmm, I'd have to say that there's something innately satisfying about using a pocketwatch/pendulum, swinging it in front of their eyes, and whispering sweet words of relaxation into their ear, as the swinging object becomes the most important thing in the room other than the voice. So I guess progressive relaxation works in with that a little bit, and would be my second favorite.
Spirals are also all well and good, whether magical or technological in nature. Of course, I feel better about tech spirals if someone is standing there, either watching them while the programming is in place (especially if pre-recorded, as was said earlier it's silly if it's just a random download-y thing, unless either specially made or as a joke), or specially made just for that person and the tist is going to collect his/her prize right after the programming is complete.
I dunno about just magic, 'Poof, you're my slave!', mostly because it can be really unimaginative and boring in manips after seeing thousands of the same thing, but well executed makes it on par with the aforementioned examples.